add setup file for nginx-proxy-manager that fixes an issue with the config.json file being a file instead of a folder.

rpi_nginx-proxy-manager.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+echo "creating directories"
+sudo mkdir -p /portainer/Files/AppData/Config/nginx-proxy-manager/data
+sudo mkdir -p /portainer/Files/AppData/Config/nginx-proxy-manager/letsencrypt
+sudo mkdir -p /portainer/Files/AppData/Config/nginx-proxy-manager/database
+echo "Creating a blank nginx-proxy-manager config files"
+sudo touch /portainer/Files/AppData/Config/nginx-proxy-manager/config.json
+echo "done you can now install the stack"